Type-writing machine.



v O. HBLLSTROM. v TYPE WRITING MACHINE. APPLIOATIORHLBD um 22, 1908.

UNITED STATES PATENT OFFICE.

CHARLES HELLSTROM, F HARTFORD, CONNECTICUT, ASSIGNDR T0 UNDERWOOD TYRE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

. TYPE-WRITING MACHINE.

Specification of Letters Patent. Patented Sept. 20, 1910.

Application filed January 22, 1908. Serial No. 412,119.

imityof the guides to each other, the writing To all whom "it may concern:

Be it known that I, CHARLELIIELLSTROM,

a citizen of the United'states, residing in Hartford, in the county .of ,Hartford and I State of Connecticut, have invented certain new and useful Im rovements in Type- Writing Machines, of which the following is a specification.

This invention relates to the paper feed can he carried close to either side edge of the card, since when the card moves to the right or left pasteithr guide, the other guideholds the card against the platen, while the- 'flarmg 11p enables the firstguide to regain control of the card at the opposite movement' of the platen. I also provide a pair of rolls to run upon theplaten immediately ing devices of writing machines, particuabove the tops of the guides, to control the larly to those of the-front strike variety, in card after it has advanced beyond the'usual which a ribbon is vibrated up and down to pressure rolls, so that writing may be concover the rinting pointjat the type strokes. tinned l'l llt down to the bottomedge of the Much diiliculty has been experienced in card. Tliese rolls are adjustable lndepend- 15 guiding stiff cards around the cylindrical ently of each other along the platen. A key platen, because the cards tend constantly to is moun P I .tlle pl t n frame and C 11- bulge out from the platen and to catch in nocted to the rolls to release them, the conthe ribbon, and also to catch upon the type struction being such that the rolls w ll stand aide. Moreover, it has been found usually away from the platen withoutfurther attenimpracticable to write upon the card near tion from the operator, so that the leading its topand bottom edges, which are .found edge of the advanclng card may pass" beespeclally liable to stand away from the tween the rolls and the platen; whereu on,- platen, and which hence are not properly the key may be lifted to restore the rol svto supported or backed to receive the type active positions, and the rolls then serve .to l blows. I hold, the card smoothly against the platen,

The object of the present invention is to.

I ing to be done. along its top and bottom ed es.

yimprovements areillustrated as appliedto an Uriderwood front strike writing machine, in which a cylindrical platen is revolubly mounted upon a platen frame, the latter supported upon a traveling carriage. I mount upon the framework of the machine two card guides, each consisting of a thin yielding plate and extending upin contiguity to the platen well beyond the printing line on the platen, one on each side of the ribbon vibratorand close thereto, so as to hold firmly againstthe platen all portions of the card which are in the immediate vicinity of the printing point at anytime. These guides hold both top and bottom edges close against the platen, so that the card is well supported'and may be written along both its'top and bottom edges. Each of the card guides also has on each of its sides a forwardly flaringlip adapted to turn the .side edge of. the card toward the platen as the latter moves longitudinally, so that liability of the edge of thecard catching upon parts seen at Fig. 1.

and to advance the same after ithas ad mounted underthe platen.

In the accompanying drawings, Figure 1 is a sectional side elevation of. a. platen frame of an Underwood typewriting machine, showing my improvements applied thereto. Fig. 2 is a perspective view of a card guide. Fig. 3 is a front elevation of manner in which a roll-releasing key is held in depressed or abnormal position. Fig. 5 iso fragmentary view similar to Fig. l, but showing the card holding rolls as swung slightly away from the platen, to form a temporary guard or guide for the card as it is inserted in the machine. Fig. 6 is a plan to illustrate the positions of the card guides backof the usual ink ribbon.

Types 1 strike through a ribbon 2 upon the front side of a platen 3', which-is journaled by'means of an axle 4 in the ends 5 Fig. 4 illustrates theof a platen frame, which comprises a paper shelf 6. A gage 7 for the side ed e of the card is attached to the paper shelf 6. ;The card 8 is'carr'ied around the under side of the platen by theusual rear and front pressure rolls '9 and 10. As it advances up the w front sides of the platen, it passes under the -control '.Of arpair-of. guides 11, which are attached at their lower ends. by means of 1 screws 12 to a type bar segment 13, and ex tend upwardly and rearwardly to form with the platen a directrix'for the leading edge of the card, The card guides extend up beyond the writing or printing line on the platen, Fig. 3, and bear yieldingly against,

the front of the platen and hold the card firmly thereagainst. These guides are very close to the usual vibrator 2 which carries the ribbon 2, so that the leading edge of the card may not catch that portion :of the ribbon which stretches across the back of the vibrator, the guides being sulficiently v close tothe platento 'press the leading edge of thecard back from the ribbon. Each of the guides has flaring lips 14, 15, upon its sides to directthe side edge-of the card toward the platen, so that the platen can riage (a portionof which is seen at 16) may be run ackwardand forward freely; Each guide 'is close to the Vibrator 2%, so that whenthe cardhas advanced past one guide, it is held by the other, andthus writing may be carried. close to the sideedges'of the card,

. Each'guide is also-provided with an'upa wardly extending fia-ring'lip 17. "Eachguide'ltis provided with an apertureor eye 18; preferably rectangular, and extending fo'r nearly the entire widthof the guide; The'low'er edge 19 of each eye is coincidentor in register with the printing line on the-platen-, and both: said lower edges taken togethermayibemade-to do duty as.

a scale toenablethe operator to uare'the -'leading'edge-of the card to the wri ing line,

a pair of rolls 21 and the platen 3, Fig. ,5,

said rolls havingbeen 'cast'oif by means of a key 22'. The latter'is mounted upon'one thumhscrewsQS. which pass down through bases 26- secured to said vokcs, and seated end of 'a rock shaft23 journaled at'i'ts ends in yokes- 2st, the 'latter detachably' secured upon the-platen frame-ends by means of upon the topsof the-side bars of th platen frame; A'long the lIlDClBP'SlC lG of the rock shaftei ends a groove 27, in which fit-rolls or'k'e 8' -guirl-e(l* 1n slots 29 formed'rn the arms?of the'voke2i. Itow-s rim-s30 "ress' the ro'l'l si' 28 into the groove, and thereby hold theirock shaftin normal position'with th'eK-key 22 elevated,"li iga' l. -VVhenithe key* is "depressed; tothe Fig. 5 "position, the 1 1folls 28=-are forced out of the groove 27 "and" press uponthe cylindricalperiphery of the produce an: objectionable permanent set or edge coincides with the printing line, said 'edge of the card" from catching upon the 125; form off-a plate having-an eye whose lower rock shaft, and are hence incapable of tIIIH- ing the latter, so that the rolls 21 stand away from theplaten without the necessity, of the aerator holding down-the key v The pressure rolls'21 are supported upon thejrockshaftby means of yokes 31 similar to 24. and having keys 32 pressed by springs Y into the groove 27, so that the yokes and rolls 21 are compelled to swing with. the rock shaft. w Either yoke. 31 maybe slid alongthe shaft independently 'of the other, orv swung up '-independently as indicated in dotted lines at Figg 5. The pres sure of each roll 21" against theplaten 3' may be independently*regulated by means of a thumb screw 3 tthreadedithrough an ear 35,that is, attachedby screws-361w I the crossbar of the yoke .311 Said screw presses against a yielding ar1n*37, Wh0 6 lower end carries the roll 3 21:," and whose upper end is bent at 38 and clamps between the ear 35 and the yoke 31;

In moving from the'printinglline, the card goes directly behindthe rock-shaftj23, which is'right over the front of the platen, so thatthere is no necessity to flex the card unduly around the top of the platen, which would tend to make its bottom edge b1'11ge'-;' out at the printingpoint, and would usually 1 curve in the card itself. 1 i v,

' Having .thus' described my invention, Ii

claim j 1. In a front strike writing machine having a revoluble, platen and a carriage there '100 for, and a ribbon carrier mounted in front 1 -of the platen, a card holder"comprisingxa pair. of yielding guides mounted upon the framework and extendingupwardly beyond the printing lineand contiguous to the platen, one at each side of the ribbon car-*2 rier and close 1th'ereto,-to prevent the lead ingedge of the card from catchingu'po'n' the ribbon; each of said guides being in the form of *a plate having an eye whose lower eyes cooperating to enable the operator to adjust any desired'line on the card to regis- I ter with the printing line onpthe' platen.

2. In a frontstrikewritin ac 1ne1having a revoluble plat-enand-a or herefor, and a ribbon-carrier-mountedzi fr "t of the platen, a,card-holder:'fcomprising ifa pair of yielding guides mounted fupon the framework and extending upwardly beyond the printing line and" contiguous "to the platen, one at each side of the" ribbonfcarrierand close thereto, to prevent the leading ribbong each" of said 2 guides being in the" edge coincides with; the printing line, said 1 eyes "cohperating togenable theo erator toxadjnst'a'nyfldesired line-onthe car into reg-.-

ister "with the printing line onthe platen; 130

a of a the; platen,

scale marks being provided on said guides at said lower edges to register with type impresslons.

3.111 a front strike writing machine hav-- platen and a carriage there-r inga revoluble for, and a l'lblJOIl carrier mounted in front a card-holder comprising a a. -pairof yielding-guides mountediupon the V ing, edge of the ribbon; each of said framework and extending upwardly beyond the printing line and contiguous to the platen, one at each side of the ribbon carrier and closethereto, to prevent the leadedges of the cardtoward the edge coincides with the eyes cooperating to enab adjust any desired line ister with thehprinting combination with a I platen. frame,'of'a rockr shaft journaled at its endsupon the platen frame over the platen w and extending along the front of the platen, afar'ns dependent from said rock-shaft and i the. spring is ineffective to operate the shaft and fromithe' platen-to the platen {said "spring and rocl "having rolls at their lower ends to run upon the -platen, a*key on said rock shaft to move said rolls away from the platen, and a spring to cause said shafttopress the'rolls against -shaft being constructed'to permit the finger piece to rotate the shaft slightly to'a position at which to hold the rolls mechanically away form a temporary guard for the card while the leading edge of the card" advances. between the rolls and the platen.

15.-In a front strike writing machine, the

combination-with a revoluble platen and a and to hold the rolls platen, frame, of

platen frame, ends .upon the platen frame over the platen and extending along the front of the platen,

having rolls at their lower ends to run upon the platen, a keyon said rock shaft to move said rolls mvayfrom the platen, and a spring to cause said shaft to. il'ess the rolls'against the platen: said spring and rock-shaft being constructed to permit the finger-piece to rotate, the shaft slightly to a position at which the spring is ineffective to operate the shaft mechanically awa v froni.thcfplatemto form a' temporary guard for the card while the leading edge of the card advances between the rollsand the platen: said arms splined to the rock shaft for adjustment thcrealong.

(5. In a front strike writing machine, the combination with a, revoluhle'platen and a a rock shaft ournaled at and having rolls at guard for the card while of a rock shaft journaled at its a its ends upon the platen frame over the platen and extending along the front of the platen, arms dependent from said rock-shaft 4 their lower ends to run upon the platen, a key on said rock shaft to move said rolls away from the platen, and a spring to cause said' shaft to press the rolls against the platen; said spring and rockshaft being constructed to icrmlt the finger piece to rotate the shaftsliglitly to a position at which the sprin is Ineffective to operate the shaft-and to ho d the rolls mechanically away from the platen to form a temporary the leading edge of the card advances between the rolls and the platen; said arms splined to the rock shaft for adjustment therealong, and each having independent means for adjusting the pressure of its roll against the platen.

7. In a front strike writing machine, the

combination with a revoluble platenand a] platen frame, of a rock shaft journaled at its ends upon the platen frame over the platen and extending along the front of the platen, arms pendent from said rock shaft and having rolls at theirlower ends to run upon the platen, a key on said rock shaft to move said rolls away from the platen, and a spring to cause said shaft 'to press the rolls against the platen; said arms splined to the rock shaft 'for adjustment therealong, and

each having independent means for adjustlng the pressure of its rolls against the platen, comprising an ear secured to said arm, a spring carrying said roll, and a thumb screw to press the spring.

8. In a typewriting machine, the combination with a revoluble platen and a platen" frame, of a rock shaft having a longitudinal groove, yokes fixed upon the platen frame ends, the rock shaft being journaledin the yokes, rollers fitting in slots in the yokes and pressed by springs into said groove, rollcarrying arms having yokes hung upon said rock shaft and adjustable therealong'and also having rolls pressed by springs into said groove, and. a key upon said rockshaft to swing thearm away from the. platen and force the first mentioned rollsout of the groove.

9. In a front strike writing machine hav; ing a revoluble platen and a carriage therefor. and a ribbon vibrator mounted in front of the platen. a cardholder comprising a pair of yielding guides mounted upon the framework and extending upwardly beyond the printing line and contiguous to the platen, one at each side of the ribbonvibrator and close thereto, to prevent the leading edge of the card from catching upon the ribbon; and spring-pressed rolls mounted upon the platen frame to bear against the platen directly above said uides.

- 10. In a' front strike writing machine having a revoluble platen and a carriage therei for, and a ribbon vibrator mounted in front."

&

of the platen, a card-holder comprising a pair of yielding guides mounted upon the framework and extending upwardly beyond the printing line "and contiguous to the platen, one at eachside of theribbon vibra-I tor and close thereto, to prevent. the leading;

edge of'the card from catchingupon -the.

' ribbon; spring-pressed rolls mounted upon the platen'fr'ame to bear against the plat'en directly above said guides, and'a key to throw said rollsslight ly away from the platen ,to serve as temporary guards on guides for-the card at its insertion 1nto the machine. l p

11. In a front strike writing machine haviing a revoluble platen anda carriage therefor, and a ribbon vibrator mounted in'front of "the platen, a. card-holder comprising a pair of yielding guides. mounted .iupon the framework and extending upwardly beyond the. printing line" and conti nous to the platen, one at each side of t eribbon v1 brator and close thereto, toprevent thej leading edge of the card from. catolring upon' the f ribbon; spring-pressed rolls mounted upon the platen frame. to bear againstthe platen'directl above said ides,and-a'.keyj rolls j away 130m," the platen .pair oi, yielding. guides mounted upon the framework and extendinggupwfardly beyond" the printing. lineand contiguous to the platen, one at each side ,of 'thejribbon vibrator and close thereto,to. preyent the leading edge of the card from catching upon the ribbon; spring-pressed rolls mounted upon the platen frame to bearagainst theplaten directly above said guides and. a. key. to throw said rolls away? from. the platen;

.means being provided to hold said rolls in released "positions; said rolls beingfindee pendently adjustable along the platen.

13. In a'front strike writing machine haV! ing a revolubleplaten and a carriage there-.

for, and. a ribbon vibrator mounted in, front of the. platen, .acard holder comprising a. pair. of: yielding; guides mounted upon. the

framework and extending upwardly. beyond.

the. printing linetand contiguous to the platen, oneat each side of the ribbon vi brator and close thereto, to preventthe' lead--, ing edgeof the card from catching upon the fribbon ,.a.rock.shaft journaled at its ends upon :the platensframe over the platen and extending along'the front of the platen,-farms,

pendent from said rod: shaft and having;

rolls at their lower ends to run 'uponqthe.

platen, a key-in said rock shaftW toImove,

said'rollsaway from the platemand a spring to eause saidshaftl to press the. rolls; against? the platen. i r 14. jInXia. typewritin bination With arevo1u e V and a platen frame, of a rock shafthavingg a' longitudinal ends, the rock shaft; yokes, rollers-g fitting n1 ing ournaled. in the '1nachine,-. theycom- '7 0 groove, .yokesgafixed upon-the; platen [frame 012 in {the yokes I i n press d yz plt i g rin e sa d grOQVe I carrying. arms secured upon said rockshaft" and ad ustable. .therealong, and a key. upon said rockfshaftto swing the arms v away from thefpla tfen and force thei'first-mentionedrolls I outToffth-lgroove. i l. p .15.. front strike Writing machine haV-. ingq'a revolubleiplaten and a carriage thereof. th

p I f'platen; .a Icard ho1der .comprising" a P 190;

frameworkand extending upwardly beyond. 1 thegp intingflline' and j contiguous." to the one Qat. each side ofpj'the ribbon; .Vibratorfand'closethereto, "to prevent the lead-" inggedg'e. ofthe card fromLeatelling. npon the pla a' rib on, spring-pressed "rolls" mounted upon the: plateuframe to bearagainst the for, anclairibbon vibrator mounted, in .front yieldingguides mounted; upon the.

platen directly above saidjguides; saidrolls;

' carried on i a. rod or shaft extending; along.

the. frontof'the platen, to permit the f'card to move. substantially straight." upFfrordthe .printlng point andemerge ina substantially flat conditionbetween the rod'an'd the platen. 16. Ina front strike writing machine hav inga revoluble platen andfa .carriage therefor, \and a ribbon vibrator mounted inQfiDnt of the platen, a card-holder. J comprising 1 pair;ofyielding guides mounted. upon 1 the framework and extending 'upwardlyibeyondfl the printing line and contignousuto {the p platen, one at each side' of the "ribboni'v r brator and close thereto, to prevent the leading edge of :thecard from catching 'uponlthe ribbon, and, spring 5 'pressed frol lsi gmonnted .upon the platen frameto beargageinstthe. 111.0

platen directly .above said-guides; flli of said guides having-laterally beve led guards or guidesj in proxlmi'ty to said ribbon vi.-

brator to catch the :sidefed es of the, card as the, carriage moves to-andifro. Y

\ HELLSTBOM'. 

